[TLL]

Its tight but it works fine with a Vortec distributor because you don't turn a Vortec to adjust the timing like the older ones. The computer controls the timing. They make a Vortec version of the intake. Just look on Summit or Jegs. A Vortec distributor cap sits much lower than the old HEI too so it does not interfere with the plenum. What you are reading referes to not being able to use an old HEI on a pre 1996 intake. A TPI will not flow well enough for the potential of Vortec heads so you will be giving up power that way as well.